Improvement in apparatus for drying sand and gravel



UNITED STATES PATENT QFFICE.

ALLEN H. BAUMAN, OF MAPLETON, PENNSYLVANIA.

IMPROVEMENT IN APPARATUS FOR DRVING SAND AND GRAVEL.

Specification forming part of Letters Patent No. 121,746, dated December12, 1871.

To all whom it may concern:

Be it known that I, ALLEN H. BAUMAN, of Mapleton, in the county ofHuntingdon and Stato of Pennsylvania, have invented a Machine for DryingSand and Gravel. rIhe following is a specification ot' my invention:

My invention relates to the combination of iron or metal pipe or pipes,so constructed and ar ranged in parallel and longitudinal lilies as toform a surface upon which the wet sand or gravel is placed to be driedby the application of iire or steam. The surface formed by the pipe orpipes forms the bottom of a box or frame which contains the wet sand orgravel. The pipe or pipes throughout the whole surface are heated byiire or steam passing through them, so as to dry the sand or gravel,which, when dried, slips and passes through the openings or spacesbetween the lines of pipe, the wet sand or gravel in the box or frameabove drying gradually and passing through ready for shipment and use.

Figure 1 is a side and surface view of the machine, representing it inpractical nse and operation, and houY heated by the application of tire.Fig. 2 shows the sets of pipes as placed and aranged when tire is usedfor heating them. Fig. 3 represents a side view of the machine as usedWhen steam is applied for drying. Fig. 4 is a plan showing the pipeadapted to the use of steam, so bent, construct-ed, and arranged as toforni the surface K, and representing the vents or orifices Wherethesteam enters and escapes.

A A is the box or frame in which the Wet sand or gravel is placedpreparatory to being dried. The bottom of this box or frame is formed bythe sets of pipes shown by c c, &c. On the surface formed by these pipesthe Wet sand or gravel rests and adheres until it becomes dried, when itpasses through the openings or spaces between the pipes. These openingsor spaces are shown by the dark lines of shading on Figs. 1 and 2. Thepipes c c, 85o., ae heated by and from the furnace, at one end of thesame. This furnace is represented by B B. The fire, heat, and smoke ofthe furnace enters at the orifices c o, Sac., and passes through thepipes and into the flue or smoke-stack D at the other ends of saidpipes, and thence into the smoke-stack E. Immediately underneath theWhole of the surface formed by the pipes is placed a wire sieve, F F, toprevent the sand or gravel from passing too rapidly through the spacesor openings between the pipes, and before the same is sufficientlydried, the sieve so used to be coarse or tine accordii'ig as the sand orgravel is coarse or tine.

In case lire is applied for drying the sand or gravel, one or more setsmay be used. It' more than one set is used they are to be so placed thatthe pipes of the set below will be directly under the spaces or openingsof the one above, and as shown in Fig. 2.

In Fig. 3, Land M represent the orifices or vents at the ends of thepipe where the steam enters and escapes. These ends are shown in Fig. 4by the same letters. Either end of the pipe may be used to admit thesteam or allow it t-O pass out and escape. K represents a side view ofthe surface of pipe. H H is simply a hopper into which the sand 0rgravel passes after being dried. O 0 shows the steam-valves used toadmit or sluit oftl the steam. These are also shown by the same lettersin Fig. 4. In Fig. 4, K shows the surface formed by a continuation ot'pipe bent and arranged in parallel lines. This is adapted to the` useand application of steam in drying the sand or gravel. This surface isheated by steam passing into the pipe at one end and out at the other.In this iigure G G represent the box or frame, in which the wet sand orgravel is placed to be dried. Underneath the set or sets of pipe used indrying by steam the wire sieve F F, shown in Fig. l, is placed in thesame manner and for the same purposes as when iire is used for drying.

The pipe or pipes used in my invention are to be of iron or some otherstrong and durable metal.

I claim as my invention- The apparatus herein described for dryinggravel `or sand, consisting of the nre-chamber, fines, heating-pipes,and case, all constructed and arranged substantially as set forth.

ALLEN H. BAUMAN.

Witnesses:

JACOB DAvs,

JAMES S. RICHARDSON. (126)

